21 September 1983 SUPERSEDLNG ANSL A l 12 21 2 1971 14 December 1982 ACCEPTANCE NOTLCE T h i s non government document was adopted on 2 1 September 1983 and i s approved for use by t h e DoD clearance[.]
2 September 1983 SUPERSEDLNG ANSL A l 12.21 2- 1971 14 December 1982 ACCEPTANCE NOTLCE T h i s non-government document was a d o p t e d on September 1983 and i s approved for use by t h e DoD The i n d i c a t e d i n d u s t r y group h a s f u r n i s h e d t h e clearance r e q u i r e d by e x i s t i n g r e g u l a t i o n s Copies of t h e document a r e s t o c k e d by DoD S i n g l e S t o c k P o i n t , Naval P u b l i c a t i o n s and Forms C e n t e r , P h i l a d e l p h i a , PA 19120, f o r i s s u e t o DoD a c t i v i t i e s only C o n t r a c t o t e and i n d u s t r y groupe must o b t a i n c o p i e s from ANSL, 1430 Broadway, New York, NY 10018 Title OP Document: American N a t i o n a l S t a n d a r d Roof D r a i n s Date o f S p e c i f i c I e s u e Adopted: J u l y 31, 1983 R e l e a s i n g I n d u s t r y Group: American S o c i e t y of Mechanical Engineers NOTICE: When r e a f f i r m a t i o n , amendment, revision, o r c a n c e l l a t i o n of t h i s e t a n d a r d i e i n i t i a l l y proposed, t h e i n d u s t r y g r o u p r e e p o n s i b l e for t h i s s t a n d a r d s h a l l i n f o r m t h e m i l i t a r y c o o r d i n a t i n g a c t i v i t y o€ t h e proposed change and r e q u e s t p a r t i c i p a t i o n Custodians: - 99 Army ME Navy YD Air Force Military Coordinating Activity: - YD Navy P r o j e c t No 4510-0214 Review a c t i v i t y : D U - CS User a c t i v i t y : Army Navy - CE - MC THIS DOCUMENT CONTAINS / ``-`-`,,`,,`,`,,` - Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale PAGES t-LB-33 - AMERICAN NATIONAL STANDARD Roof Drains ANSI A112.21.2-M - 1983 OF ANSI A112.21.2-1971) PUBLISHED B Y THE AMERICAN SOCIETY United Engineering Center Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS OF MECHANICAL 345 East 47th Street Not for Resale ENGINEERS New York, N.Y 10017 ``-`-`,,`,,`,`,,` - (REVISION ASME A 3 * - M 2575532 0008037 W ``-`-`,,`,,`,`,,` - Date of Issuance: July 31, 1983 This code or standard was developed under procedures accredited as meeting the criteria for American National Standards The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large ASM E does not "approve," "rate," or endorse" any item, construction, proprietary device, or activity ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, not assume any such liability Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility Participation by federal agency representative(s)or personis) affiliated with industry i s not to be interpreted as government or industry endorsement of this code or standard No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher Copyright @ 1983 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale 5 O008040 ASME A 3 * M 83 FOREWORD (This Foreword is iiot part of American National Standard, Roof Drains, ANSI A l 12.21.2M-1983.) ``-`-`,,`,,`,`,,` - Rainwater was prevented from accumulating on the roofs of the first buildings by pitching the roof to allow the water to flow off The first means to collect and control rain runoff was to provide a gutter that ran the length of the low roof section All of the water drained to the gutter, which in turn sloped to an outside downspout pipe, This was followed by the development of inside downspouts because of the unsightly appearance of the outside downspouts on many buildings The first inside downspout consisted of a sheet metal sump below the roof surface covered by a wire screen to keep out debris Later, the screen was replaced by a flange and dome-basket arrangement The first development in a roof drain, as we know it today, was a cast metal downspout head consisting of an increaser that was screwed onto the downspout pipe with a cast iron dome bolted to this increaser The problem of leakage around the downspout head between the head and the roofing material prompted the development of a clamp device to secure the roof flashing to the head, creating the first modern roof drain There followed a series of designs of roof drains incorporating the beehive or mushroom dome, non-puncturing flashing clamp device with integral gravel stop, promenade tops, deep sump drain bodies, expansion joints, and other variations in design to facilitate installation and to control the rainwater runoff USA Standards Committee Al 12 was organized July 27, 1955, for the standardization of plumbing materials and equipment The first organizational meeting was held on July 22, 1958 At a meeting on May 1, 1964, Panel No, 21 was created to establish standards on roof drains and floor drains Its scope was as follows: The recommendation of suitable existing standards in cooperation with interested sponsors or the development of adequate new standards as are needed for roof drains and floor drains as used or installed in plumbing systems Prior to the establishment of this Panel, the Plumbing and Drainage Institute started a standardization study on September 15, 1961 The PDI is an organization of manufacturers of drainage products They realized the need for roof drain standards and therefore conducted the study The Institute’s Executive Secretary acted as Chairman and the Engineers from the participating member companies were a part of the committee During the period from September 15, 1961 to September 1963, the group formulated some basic drain standards and specifications Though this information was never published, it is used as a basis for this Standard Engineer members of the Plumbing and Drainage Institute were appointed to the Task Force on Panel No 21 The first meeting was held on February 2, 1966 A rough draft of this Standard was submitted on May 18, 1966 to the Task Force members The Task Force met again on July 21, 1966 to review the second draft Revisions were made and the proposed standard was submitted to members of Panel No Following approval of the proposal by the Panel, the American National Standards Committee A l 12 and the sponsor, the American National Standards Institute approved it on July 27, 1971 This Standard was revised and approved by Panel 21, the Al 12 Standards Committee and Secretariat Subsequently this modified version was adopted by the American National Standards Institute on March 7, 1983 iii Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale AMERICAN NATIONAL STANDARDS COMMITTEE A112 Standardizationof Plumbing Materials and Equipment (The following is the roster of the Committee a t the time of approval of this Standard.) OFFICERS J C Church, Chairman C E Lynch, Secretary COMMITTEE PERSONNEL AMERICAN IRON AND STEEL INSTITUTE G T Rochford, Ji., American Iron and Steel Institute, Washington, D.C B J Enright, Alternate, Field Representative, Raytown, Missouri AMERICAN SOCIETY OF MECHANICAL ENGINEERS R V enazzi, Juros, Baum and Bolles, New York, New York THE AMERICAN SOCIETY OF PLUMBING ENGINEERS D F Dickenon, Donald F Dickercon Associates, Van Nuys, California A J Morales, Alternafe, American Society of Plumbing Engineers, Sherman Oaks, California AMERICAN SOCIETY OF SANITARY ENGINEERING J C Church, Mamaroneck, New York G R Jerus, Alternate, Meyer, Strong and Jones, New York, New York L M Reading, Alternate, ASSE Representative, Detroit, Michigan ASSOCIATION OF ASBESTOS CEMENT PIPE PRODUCERS T R Gillen, Asbestos Cement Pipe Producers Association, Arlington, Virginia ASSOCIATION OF HOME APPLIANCE MANUFACTURERS R Kerr, KitchenAid Division, Hobart Mfg., Troy, Ohio W Blanck, Alternate, Association of Home Appliance Manufacturers, Chicago, Illinois BUILDING OFFICIALS AND CODE ADMINISTRATORS INTERNATIONAL D P Jack, Hampton, Virginia J A Ballanco, Alternate, Building Officials and Code Administrators International, Homewood, Illinois CAST IRON SOIL PIPE INSTITUTE J A Woodward, Apple Valley, California CONFERENCE OF STATE SANITARY ENGINEERS C C Crurnley, Michigan Department of Public Health, Lansing, Michigan COPPER DEVELOPMENT ASSOCIATION, INC A Cohen, Standards and Safety EngineeringCopper Development Association, Inc., New York, New York INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS N J Latter, International Association of Plumbing and Mechanical Officials, Los Angeles, California V Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ``-`-`,,`,,`,`,,` - AIR CONDITIONING AND REFRIGERATION INSTITUTE L P Benua, EBCO Manufacturing Company, Columbus, Ohio R J Denny, Alternate, Air Conditioning and Refrigeration Institute, Arlington, Virginia - G A NE A 1 2M 2595532 0 LEAD INDUSTRIES ASSOCIATION E D Martin, Lead IndustriesAssociation, New York, New York MANUFACTURERSSTANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY C S Anning, Elcen Metal Products, S Melroce Park, Illinois NATIONAL ASSOCIATION OF HOME BUILDERS C D Goines, National Association of Home Builders, Washington, D.C M M Mintz, Alternate, National Association of Home Builders, Washington, D.C NATIONAL ASSOCIATION OF PLUMBING-HEATING-COOLINGCONTRACTORS R E White, National Association of Plumbing-Heating-CoolingContractors, South Bend, Indiana NATIONAL CLAY PIPE INSTITUTE R M Clementson, National Clay Pipe Institute, Washington, D.C NATIONAL ENVIRONMENTAL HEALTH ASSOCIATION G A Prince, Denver, Colorado NATIONAL SANITATION FOUNDATION T S Gable, National Sanitation Foundation, Ann Arbor, Michigan PLUMBING AND DRAINAGE INSTITUTE A O Roche, Jr., Plumbing and Drainage Institute, Indianapolis, Indiana PLUMBING MANUFACTURERS INSTITUTE C Selover, Travelers Rest, South Carolina R W Church, Alternate, Plumbing Manufacturers Institute, Glen Ellyn, Illinois SOCIETY OF THE PLASTICS INDUSTRY S Mruk, New Providence, New Jersey STATE OF NEW YORK HOUSING AND BUILDING CODES BUREAU A Y Kaplan, New York State Housing and Building Codes Bureau, New York, New York U.S DEPARTMENT OF AGRICULTURE E E Jones, Jr., U.S Department of Agriculture, Clemson, South Carolina U.S DEPARTMENT OF COMMERCE - NATIONAL BUREAU OF STANDARDS L S Galowin, National Bureau of Standards, Washington, D.C U.S DEPARTMENT OF THE NAVY R Cuendet, U S Naval Facilities Engineering Command, Alexandria, Virginia INDIVIDUAL MEMBERS R S Wyiy, Kensington, Maryland L S Nielson, Fresh Meadows, New York P J Higgini, P J Higgins and Associates, Mt Airy, Maryland Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ``-`-`,,`,,`,`,,` - U.S DEPARTMENT OF DEFENSE M E Carr, U.S Department of Defense, Washington, D.C PERSONNEL OF PANEL 21 - ROOF DRAINS, FLOOR DRAINS, AND OTHER DRAINS A O Roche JI., Chairman, Plumbing and Drainage Institute, Indianapolis, Indiana W W White, Secretary, White Plumbing and Heating Company, Detroit, Michigan J C Church, Marnaroneck, New York G J Flegel, Michigan City, Indiana M W Marshall, Tyler, Texas J M Soriano, Scotch Plains, New Jersey ``-`-`,,`,,`,`,,` - Vii Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale CONTENTS Foreword Standards Committee Roster iii v ScopeandPurpose Definitions Nomenclature Outlet Types and Connections Top Size Dome or Grate Free Area Materials Finishes Accessories 1 4 Figures 2 3 4 Tables Minimum Dimensions for Threaded Outlet Connections Minimum Dimensions for inside Caulk Outlet Connections Minimum Dimensions for Hub Outlet Connections General Purpose Roof Drain Gutter or Cornice Roof Drain Parapet RoofDrain Promenade or Deck Roof Drain 5 6 6 ``-`-`,,`,,`,`,,` - General Purpose Roof Drain Gutter or Cornice Roof Drain ParapetRoofDra in Promenade or Deck Roof Drain Bottomoutlet Sideoutlet 45Deg.SideOutlet Accessories for Drains ix Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS o Not for Resale ANSI A112.21.2M-1983 AMERICAN NATIONAL STANDARD ROOF DRAINS SCOPE AND PURPOSE 2.2 Types 1.1 Scope 2.2.1 General Purpose Roof Drain A roof drain for installation in any roof area excluding the parapet of the roof structure ``-`-`,,`,,`,`,,` - 1.1.1 Development of standards for roof drains including general purpose, gutter and cornice, parapet and promenade or deck types, which convey rainwater from the roof area of building structures 2.2.2 Gutter or Cornice Roof Drain A roof drain for installation in gutters, cornices, balconies and other overhanging construction to prevent overflow to areas below, I This Standard covers: (a) Definitions (b) Nomenclature (c) Outlet Types and Connections (d) Top Size - Dome or Grate Free Area (e) Materials and Finishes cf) Accessories 2.2.3 Parapet Roof Drain A roof drain for installation in parapets for conveying rainwater from a roof area through the parapet 2.2.4 Promenade or Deck Roof Drain A roof drain for installation in roof decks subject to pedestrian or vehicular traffic 1.2 Purpose The purpose of this Standard is to supply plumbing code authorities and others with full knowledge of the minimum design and quality criteria for roof drains It is not intended for use as a specification guide 2.3 Dome or Grate Free Area CAUTION: Illustrations bcluded in this Standard are intended oniy to describe and portray typical roof drain types and are not intended to restrict design or to be used for specification purposes 2.4 Conductor Total area of drainage openings in the dome or grate A pipe inside the building which conveys storm water from the roof to a storm or combined building drain DEFINITIONS 2.5 Leader 2.1 General An exterior drainage pipe for conveying storm water from roof or gutter A roof drain is a manufactured receptacle designed to receive and convey rainwater from roof areas to the drainage system Roof drains are available in various designs, shapes, sump depths, and outlet locations The area to be drained, location of the drain in the building structure, the local rainfall intensity and the drainage systems are factors in determining the type of drain to be used NOMENCLATURE Terms used for elements of typical roof drain types are depicted in Figs through Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ASME A332-2L.2M 83 m 5 0008046 T AMERICAN NATIONAL STANDARD ROOF DRAINS m ANSI A l 12.21.2M-1983 ``-`-`,,`,,`,`,,` - Combination flashing ring Underdeck clamp Drain body sump Outlet connection mv Bottom Outlet Side Outlet FIG.l GENERAL PURPOSE ROOF DRAIN n n Dome Combination flashing ring and gravel stop e Drain body sump r= Outlet connection b Side Outlet Bottom Outlet FIG GUTTER OR CORNICE ROOF DRAIN Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale AMERICAN N A T I O N A L STANDARD ROOF DRAINS ANSI A l 12.21.2M-1983 45 Deg Outlet FIG PARAPET ROOF DRAIN Grate Frame Extension collar Underdeck clamp Outlet connection Bottom Outlet Side Outlet FIG PROMENADE OR DECK ROOF DRAIN Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ``-`-`,,`,,`,`,,` - Drain body sump ASME A - * M 83 m 5 0008OYB m AMERICAN NATIONAL STANDARD ROOF DRAINS ANSI A112.21.2M-1983 ``-`-`,,`,,`,`,,` - ‘ = L OUTLET TYPES AND CONNECTIONS 4.1 Outlet Types 4.1.1 Bottom Outlet Threaded, inside caulk or spigot with centerline of outlet vertical See Fig 4.1.2 Side Outlet Threaded, hub (outside caulk), or spigot with centerline of outlet horizontal See Fig Inside caulk 4.1.3 45 Deg Side Outlet Threaded with centerline of outlet at a 45 deg angle See Fig Threaded 4.2 Outlet Connections 4.2.1 Threaded All threaded outlet connections shall comply with ANSI B2.1-1968, Pipe Threads (Except Dryseal) and shall conform to the minimum dimensions shown in Table FIG BOTTOM OUTLET 4.2.2 Inside Caulk All inside caulk outlet connections shall conform to the minimum dimensions shown in Table 4.2.3 Hub (Outside Caulk) All hub outlet connections shall conform to the minimum dimensions shown in Table Hub (outside caulk) Threaded spigot FIG SIDE OUTLET 4.2.4 Spigot All spigot outlet connections shall conform to the spigot end dimensions shown in American National Standard for Cast Iron Soil Pipe and Fittings, ANSI Al 12.5.1-1973, and the Cast Iron Soil Pipe institute Standard No 301-1978, Cast Iron Soil Pipe and Fittings for Hubless Cast Iron Sanitary Systems 4.2.5 Tolerances All dimensions given in Tables 1, 2, and and the associated figures are subject to standard commercial tolerances of $ 1/16 in ($.1.6 mm) TOP SIZE - DOME OR GRATE FREE AREA The roof drains covered by this Standard shall comply with the minimum requirements in Tables through MATERIALS The items covered in this Standard are to be of the material specified, suitable for installation and service FIG 45 DEG SIDE OUTLET Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ASME A 1 - - M 83 W 2575512 0008049 W AMERICAN N A T I O N A L STANDARD ROOF DRAINS ANSI A112.21.2M-1983 TABLE MINIMUM DIMENSIONS FOR THREADED OUTLET CONNECTIONS a Nominal Pipe Size, in B NPT in in mm 5/16 718 318 118 118 114 1r4 59 73 86 105 130 159 184 ~~ 112 2 112 112 2 112 6 -B-I 314 13/16 718 19 22 25 TABLE MINIMUM DIMENSIONS FOR INSIDE CAULK OUTLET CONNECTIONS Nominal Pipe Size, in B A in mm in mm 112 518 518 518 518 - 64 4118 5118 6118 118 76 105 130 156 181 92 117 143 168 ``-`-`,,`,,`,`,,` - TABLE Nominal Pipe Size, in Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale MINIMUM DIMENSIONS FOR HUB OUTLET CONNECTIONS A B in mm in mm 51 76 102 127 152 4118 5118 6118 7118 76 105 130 156 181 2575532 0 W ASME A 3 - * M AM ER K A N N A T I ON A L STAN DARD ROOF DRAINS TABLE GENERAL PURPOSE ROOF DRAIN Outlet Nominal Size Flange Diameter 102 127 152 15 15 15 203 305 381 381 38 50 70 232 323 452 in mm 51 76 102 TABLE TABLE Grate Free Outlet Nominal Size Dome Free Area mm in PARAPET ROOF DRAIN GUTTER OR CORNICE ROOF DRAIN Top Size in 4%x4%x11 114x114~279 4%x4%x11 114x114~279 % x % x 1 1 x 1 ~ 20 Grate Free Outlet Nominal Size 76 102 152 in the place specified, and shall meet all applicable requirements and standards given herein The castings for these drains shall be sound, free of blow holes, cold shuts and other imperfections, and shall be of uniform wall thickness and true to pattern They shall also be clean and free of fins It is not the intent of this Standard to limit acceptable materials to those included in this Section It anticipates the use of other materials of comparable performance 129 129 PROMENADE OR DECK ROOF DRAIN in 76 mm I 11 x l l x 13 mm 203 x 203 279 x 279 330 x 330 135 206 6.4 Bolting Materials, Steel The materials for studs, nuts, cap screws, and other steel fasteners shall at least equal the requiremenis of ASTM Specifications A 307-80, Carbon Steel Externally Threaded Fasteners, Grade A, and A 563-80, Carbon and Alloy Steel Nuts, Grade A Threads shall be Classes 2A and 2B, and shall be plated 6.1 Cast Iron Castings shall conform to ASTM Specification for Grey Iron Castings A 48-76, Class 25 FINISHES In all cases where parts are to be coated or plated, they shall be pickled as required and cleaned to provide suitable surface for proper bonding of the finish 6.2 Leaded Red and Semi-Red Brass Castings shall conform to the chemical and mechanical requirements of ASTM B 584-82 for Copper Alloy Nos C83600, C83800 and C84400 7.1 Paint Coatings Iron castings shall be cleaned and coated with a suitable paint, lacquer or synthetic coating of quality to provide protection against rusting of ferrous surfaces during normal handling and warehousing prior to installation 6.3 Leaded Nickel Bronze (Nickel Silver) Castings shall conform to the chemical and mechanical requirements of ASTM B 584-82 for Copper Alloy Nos C97300 and (37600 Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale ``-`-`,,`,,`,`,,` - TABLE ANSI A112.21.2M-1983 ASME A L * L - Z M 83 2575512 0008051 W AMERICAN N A T I O N A L STANDARD ROOF DRAINS ANSI A112.21.2M-1983 I I 8.1 Extension collar e Underdeck clamp 8.4 Drain body receiver plate 8.3 Expansion joint FIG ACCESSORtES FOR DRAINS 7.2 Cadmium Plate 8.1 Extension Collar After preplating cleaning, parts shall be given a Commercial Grade Cadmium Plate An accessory particularly suitable for use with roof drains installed in a structural deck where an additional thickness of insulation is to be added in order to raise the top flange to the roof line 7.3 Chrome Plate Decorative Parts shall be polished prior to plating and then given a Copper - Nickel Chromium Plate 8.2 Underdeck Clamp An accessory to secure the roof drain to roof deck by compressing the underdeck clamp against the underside of the deck 7.4 Bronze Chromate Parts shall first be given a Commercial Grade Cadmium Plate and then a Commercial Grade Bronze Chromate treatment 8.3 Expansion Joint 7.5 Zinc Plate An accessory to compensate for the expansion or movement of the conductor or roof After preplating cleaning, parts shall be given a Commercial Grade Zinc Plate ACCESSORIES 8.4 Drain Body Receiver Plate The optional features listed are stated here to identify the variations available for different applications See Fig A device which receives and uniformly supports the roof drain, distributing the weight of the drain over a large area of the roof ``-`-`,,`,,`,`,,` - Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS Not for Resale